Treptoceras yokoyamai (Kobayashi, 1927)
| 2002. | Treptoceras yokoyamai (Kobayashi, 1927) Niko, S. 2002a p. 121, fig. 1-1,3–7 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Paleozoic: |
| Niko, S., 2002a: Revision of an Ordovician cephalopod Ormoceras yokoyamai (Kobayashi, 1927). Paleontological Research, vol. 6, no. 1, pp. 121–124. (Reference No. 0740) |
 |
| Ito, Y. et al., 2008, no. 74, p. 34. |
